I keep hearing this word "third world" being used very losely especially by learned proffessionals like doctors.
If anyone looks up the meaning of it, there are varied lot of interpretations for what exactly is the concept of "third world". The term Third World became popular usage during the Cold War when many poor nations adopted it in describing themselves as aligned with neither N.A.T.O. nor the U.S.S.R., but instead composed an unaligned Third World.
In that context, the First World denoted the U.S. and its anti-Communist allies, concomitantly, Second World denoted the "Eastern Bloc" - the U.S.S.R. and its communist and socialist allies. For the most part, Third World did not include China. Politically, the Third World emerged at the Bandung Conference (1955), which established the Non-Aligned Movement.
Numerically, the Third World dominates the United Nations, but is so culturally and economically diverse that its political cohesion is hypothetical. The petroleum-rich countries (Saudi Arabia, Kuwait, United Arab Emirates, etc.) and the new industrial countries (India, China, Malaysia, Philippines, Brazil, Mexico etc.) as well as the rapidly growing countries such as (Pakistan, Egypt, Indonesia, Russia etc.) have little in common with poor countries (Haiti, Chad, Afghanistan, etc.
This is something that the people who use this term so losely should be aware of and then stop using the term "third world " inappropriately..